Piston



Jime 7. 1927. 1,631,952

E. 0. LONG I I PISTON Filed April 22. 920 a iii 4;; 27g. 0 i i Patented June 7,1927;

i ATENTo FFICE.

.anunn c. LONG, or comer, rumors, 'assrenon, BY unsm: nssmmmms, ro

TRUST OI DETROIT,

can.

MICHIGAN, A CORPORATION OF HIGH-- PISTON.

and its cylinder during the operation of the motor under highlyheated conditions.

Another object of the invention-is to provide a piston with entirely separated p'empheral portions,

and an improved way of supl porting said separated portions from the opposite side of the piston. r further object of the invention is in providing co-operating means in" connection with the separated peripheral portions of 1 the piston for preventing the perlpheral por- .tions from toov great a separation relative.

to each other, as well as means tending to prevent the peripheral portions from crowd- .in each other. e

%)ther and further objects will appear in the specification and be specifically pointed out in the appended claims, reference being had to the accompanyin v drawings exemplifying the invention, an in which,

Flgure 1 is an elevation of this improved,

piston disclosing the side thereof bearing the entirely separated peripheral portions.

Figure 2 is an elevation of the wrist pin side of a piston.

Fi re 3 is a vertical section taken on the line 11-111 of Fig. 1. f 1 I Figure 4 is a vertical section taken approx mately on the line IV-IV of Fig. 3.

Fi re 5 is a horizontal section taken on the lme V-.-V of Fig. 3.

Figure 6 's a horizontal section taken on the line VI-VI of Fig. 3. In the drawings, 1 designates the solid end portion of the piston which is smaller said solid end portion 1 bearingthe usual piston ring recesses 3, said solid end (portion 1 and skirt portion 2 being divide by the'transverse slot 4. t

- Formed on one side of'the piston are a pair of adjacent separated portions 5, said portions forming part of the peripheral face of the skirt portion of the piston, and are separated .-therefrom by the -entirel cut through longitudinally extending slbts 7 which lead from the lower end 8 of the piston to the transverse slot 4, each of'said portions 5 being separated from each other .which will be sup by the intermediately formed inclining slot 9.

Formed in theskirt portion of the piston and in opposing disposition from each of the slots is a longltudinally formed slot 10, said slots being cut through the thickness of the wall of the skirt portion, and in which the portion disposed between each pair of slots 7 and 10 provides a wrist pin caring side portion 11 from which a wrist pin bearing 12 interiorly extends.

In the manufacture of improved pistons of this character; the transverse slot 4 is entirely cut through the thickness of the wall of the skirt portion of the piston, but inasmuch as it is' essential to leave the wrist pin bearing sides 11 of the piston in integral relation with the solid end 1, an enlarged or bossed fportion 13 is formed on the inner wall 0 the piston extending across the width of each wrist pin side 11.

That

ranged tween the pair of! slots 10. herein- Eprtion of the skirt of the piston arafter designated as 14, and which is in op-" posing dis osition from the separated portions 5 an adapted to sup ort them, is integrally-held from the Solid end 1 of the piston, and in order to overcome the weakness that might be rovided by the cutting of the transverse 8 0t 4, a transversely arranged boss ortion 15 is formed on the in net wall of t e piston.

Formed integral with the portion 14 and .extendipg therefrom across the axis of the wrist pin bearings 12 are a pair of spaced apart I'ld ging or connecting members 16, members at ,their opposite ends being integrally connected with a respective avmgian o' nin 17, said openin being in alinement with this wrist pin beari ii gs 12 and are larger m diameter than the wrist pin ported bysaid bearings so that the wrist 1n will not come in contact with the mem rs 16. 'For reinforcing the supporting portion 14 relative to its connection with the solid end, 1 of the piston, a depending rib 18 is rovided which extends from the said soli end and the cross rib 19 to a position adjacent the lower end of the portion 141 Horizontally supported in the membe 16 adjacent the respective separated portions separated portion 5, eachof said members in diameter than the skirt portion 2 thereof, b

to which they are connected is a tie bolt 20, the head 21 thereof bearing against the outer surface of one ofsaid members 16 whereas a nut 22 is mounted on the thread ed end 23 of the bolt and bears against the outer surface of the other member '16, said bolt also bearing a jam nut 24! which bears against the inner surface of the last mentioned member 16. Mounted on said bolt is a coil spring 25, one end of which bears against the jam nut 24 whereas the opposite end thereof bears against one of the mmare a [pair of depending wrist pin port\ions 11 an the depending portionl l.

It is a knowniact that the solid end of an internal combustion engine piston is considerably smaller in diameter than the cylinder in which it reciprocates, on account of the fact that the piston rings carried by said solid end are adapted to receive the cylinder wear. In order to provide a proper balance to the piston relative to the piston rings carried thereby, as well as the piston being provided with a proper guiding and fittingrelation relative to the cylinder, it therefore resides in the skirt portion of the piston to be machined ofx'a proper size for its engagement with the cylinder. In this connection in ordinarily constructed pistons it has been found that under highly heated conditions the skirt portion of the pistons will too tightly engage the c linder.

This invention is t erefore deemed to es tablish a proper worlcin fitting relation to the skirt portion of the plst'on relative to the cylinder under allworklng conditions thereof, and in which the, longitudinal slot rovided in the skirt of'the piston will a low the (portions separated by. said slots to expan towards each other in a circular direction as against an outward thrusting direction upon the cylinder wall, that is, under highly heated conditions. For further enhancing the value of the several separated portions referred to of the skirt portion of the piston, the entirely cut away or wholly. separated portions 5 are under'controlof the tie bolt 20, said bolt being adjustable, and

on account of its relation with the connecting members 10 that support the respective portlons 5*fro'm the op ositel" disposed portion 14',- the setting 0 said olt relative to lin said portions 5 against comingtogether an closing the slot 9 therebetween, the

sprin 25 mounted on said bolt 20 will tend to' boil said portions 5 apart. What I claim is:

1. A piston having a portion of its peripheral face entirely cut away, thereby forming a separated peripheral portion, supporting means secured to said separated portion extending to the opposite side of the piston for holding said portion in peripheral alinement with the peripheral face of the piston and means related to said separated portion for limiting the amount of separation of said portion from an adjacent peripheral portion.

2. A piston havin a portion of its peripheral face entire cut away, thereby forming a separated peripheral portion which extends from one end of the piston, and supporting means secured to said separated portion extendin to the opposite side of the piston for hol mg said portion in peripheral alinement with the peripheral face of the piston, said extending means being free from engagement with the wrist pin bearings of the piston.

3. A piston having a pair of adjacent portions of its peripheral wall entirely cut away, thereby forming separated peripheral portions,'and supporting means secured to said separated portions extending to the opposite si e of the piston wall for holding said portions inperipheral alinementwith the peripheral face of the iston. said opposite side of said iston wall eing depended from the-head o the piston. v

4. Apiston havi'ng a air of portions of its peripheral face entire y cut away, thereby forming separated peripheral portions, supporting means secured to said separated portions extending to the opposite side of the piston for holding said portions in eripheral alinement with the eripheral ace of the piston and means reliited to said separated portions for limiting the amount of separation of said portions relative to one another. l

5. Piston having adjacent portions of its eripheral face entire y cut away, thereby orming separated (peripheral portions, securing means exten ing to each of saidportions from the interior of the piston, for holding said portions in peripheral alinement with the peripheral face of the piston, said securing means being free from en a ment with the wrist pm bearings o t e piston.

6. A piston having adjacent portions of its peripheral face entlrely cut away, thereby forming separated eripheral portions, securing means exten mg. to each of said portions from the interior of the piston for holding said portions in peripheral alinement with the peripheral face of the piston,

means tending to separate said portions from one another, and other means for limiting the amount of separation of said portions relative to one another.

7. A piston closed at one end having a pair of spaced apart slots longitudinally formed in the skirt portion of the piston from the open endthereof, a pair of portions entirely cut away from the skirt portion of the piston, oppositely disposed from 'said slotted portion, and a rib extending from said slotted portion to each of said entirely cut away portions.

8. A piston open at one end and closed at its opposite end, said piston having its skirt portion slotted entirely through the thick ness of its periphery wall, and providing a pair of adjacent portions which are entirely cut away from the skirt portion, a pair of wrist pin bearings disposed within the piston, and a web extending to each of said adjacent portions of said skirt portion, said webs bein free from engagement with said wrist pin earings.

9. A piston havin 'a portion of its eripheral face entire (1y cut away, there y forming a separate peripheral portion, and supporting means secured to said separated portion extending to the opposite side of the piston for holding said portion in peripheral alinement with the peripheral face of the piston, and means related to said separated portion and another portion of the piston for limiting the amount of separation of said portions from one another. I

10. A iston having a pair of portions of its peripli eral face entirely cut away thereby and resilient means disposed forming separated peripheral portions, supportmg means secured tosaidseparated portions extending to the opposite side of the eral alinement with the peripheral face of the piston, and means related to said se arated portions comprising an adjusta le member forlimiting the amount of separation of said portions from one another.

11. A piston having-a pair of portions of its peripheral face entirely cut away thereby forming separated peripheral portions supporting means secured to said separated por- .tions extending to the opposite side of the piston for holding said portions in peripheral alinement with the peripheral face of the piston, means related to said separated portions comprising an adjustable member for limiting the amount of separation of said portions from one another, and resilient means mounted on said member tending to hold said portions separated.

12. A piston open at oneend and closed at its opposite end and having its skirt portion slotted from the open end to a point adj acent the closed end of the piston, said slotting formin adjacent disconnected portions which are w olly separated from the remaining part of the skirt portion, a air of wrist pin bearings disposed within t e piston, a web extending to each of said adjacent portions of said skirt, said webs being free from engagement with said wrist pin bearings, between said webs. 1

'ELMIER 0. LONG.

'40 piston for holding said portions in periph- I 

